diff --git a/searchcore/src/vespa/searchcore/proton/metrics/documentdb_tagged_metrics.cpp b/searchcore/src/vespa/searchcore/proton/metrics/documentdb_tagged_metrics.cpp
index c1e87a834b6c..af03133edcd3 100644
--- a/searchcore/src/vespa/searchcore/proton/metrics/documentdb_tagged_metrics.cpp
+++ b/searchcore/src/vespa/searchcore/proton/metrics/documentdb_tagged_metrics.cpp
@@ -93,7 +93,8 @@ DocumentDBTaggedMetrics::IndexMetrics::IndexMetrics(MetricSet *parent)
     : MetricSet("index", {}, "Index metrics (memory and disk) for this document db", parent),
       diskUsage("disk_usage", {}, "Disk space usage in bytes", this),
       memoryUsage(this),
-      docsInMemory("docs_in_memory", {}, "Number of documents in memory index", this)
+      docsInMemory("docs_in_memory", {}, "Number of documents in memory index", this),
+      disk_io(this)
 {
 }
 
diff --git a/searchcore/src/vespa/searchcore/proton/metrics/documentdb_tagged_metrics.h b/searchcore/src/vespa/searchcore/proton/metrics/documentdb_tagged_metrics.h
index 6191678c2bda..66fed96263fd 100644
--- a/searchcore/src/vespa/searchcore/proton/metrics/documentdb_tagged_metrics.h
+++ b/searchcore/src/vespa/searchcore/proton/metrics/documentdb_tagged_metrics.h
@@ -97,6 +97,7 @@ struct DocumentDBTaggedMetrics : metrics::MetricSet
         metrics::LongValueMetric diskUsage;
         MemoryUsageMetrics memoryUsage;
         metrics::LongValueMetric docsInMemory;
+        DiskIoMetrics disk_io;
 
         IndexMetrics(metrics::MetricSet *parent);
         ~IndexMetrics() override;
diff --git a/searchcore/src/vespa/searchcore/proton/server/documentdb_metrics_updater.cpp b/searchcore/src/vespa/searchcore/proton/server/documentdb_metrics_updater.cpp
index 73fa84685cb0..02633cffeb36 100644
--- a/searchcore/src/vespa/searchcore/proton/server/documentdb_metrics_updater.cpp
+++ b/searchcore/src/vespa/searchcore/proton/server/documentdb_metrics_updater.cpp
@@ -80,6 +80,7 @@ updateIndexMetrics(DocumentDBTaggedMetrics &metrics, const search::SearchableSta
     updateMemoryUsageMetrics(indexMetrics.memoryUsage, stats.memoryUsage(), totalStats);
     indexMetrics.docsInMemory.set(stats.docsInMemory());
     auto& field_metrics = metrics.ready.index;
+    search::CacheDiskIoStats disk_io;
     for (auto& field : stats.get_field_stats()) {
         auto entry = field_metrics.get_field_metrics_entry(field.first);
         if (entry) {
@@ -87,7 +88,9 @@ updateIndexMetrics(DocumentDBTaggedMetrics &metrics, const search::SearchableSta
             entry->size_on_disk.set(field.second.size_on_disk());
             entry->update_disk_io(field.second.cache_disk_io_stats());
         }
+        disk_io.merge(field.second.cache_disk_io_stats());
     }
+    indexMetrics.disk_io.update(disk_io);
 }
 
 struct TempAttributeMetric